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Philips Mercury Fluorescent Blacklight HPW 125W TS |
The suffix -T is derived from American nomenclature of HID lamps, and indicates that they are safe for use in open fixtures. 'T' lamps automatically switch off if the outer bulb should be broken, eliminating the escape of dangerous shortwave ultraviolet wavelenghts. This is accomplished by placing a small tungsten filament in series with the arc, which operates as an oxygen fuse and burns out to break the current to the arc if it is exposed to air. It is located near the end of the bulb and can be seen in the X-Ray image.
The main feature of this HPW-TS lamp is the addition of a coating of SBE phosphor over the inner surface of the outer bulb. The material is Strontium Tetraborate activated by Europium, and this converts some of the useless shortwave radiation into UV-A wavelengths so as to achieve about 70% stronger blacklight effect than the standard HPW-T and HPW lamps. The broad phosphor radiation peaking around 370nm can be seen clearly in the spectral power distribution chart. Despite this apparntly significant benefit, the lighted photo illustrates that the light source is enlarged from a thin arc to the much larger bulb surface. Many blacklight lamps are used in a polished aluminium reflectors to deliver a powerful beam of radiation, but the increased source size resulted in a much wider beam of lower intensity than from the standard lamps. As such the HPW-TS was confined to the relatively small market of flood-beam or omnidirectional applications. This greatly limited its success, and it was discontinued around the middle of the 1990s.
| Manufacturer: | NV Philips Gloeilampenfabrieken | |
| Lamp Power: | 125 Watts | |
| Lamp Current: | 1.15 Amps | |
| Lamp Voltage: | 125 Volts | |
| Cap Type: | E27/27 | Ni plated brass + porcelain |
| Bulb Type: | ED-75 | ED23.5 in eighths/inch |
| Bulb Finish: | SrB4O7:Eu2+ phosphor | Wood's Glass |
| Electrodes: | Backwound Tungsten | Double carbonate emitter |
| Atmosphere: | Inner: Hg|Ar | Outer: Nitrogen |
| Luminous Flux: | 0.5 lm | |
| Luminous Efficacy: | 0.004 lm/W | |
| UV-A Flux: | 5.1 Wrad | 320-400 nm |
| UV-A Efficiency: | 4.1 % | 320-400 nm |
| UV-A Irradiance: | 600 mW/m² | @ 1m distance |
| Chromaticity Co-ordinates: | CCx: 0.20 | CCy: 0.05 |
| Rated Lifetime: | 2000 hours | |
| Warm-up & Re-strike Time: | 3 minutes | 3 minutes |
| Burning Position: | Universal | |
| Overall Length: | 177 mm | |
| Factory: | Turnhout | Belgium |
| Date of Manufacture: | 1991 September | Date Code: 1J |
| Original Value: | Unknown | |
